bluetooth landline bridge

Equipment: samsumg SGH-A777 and Cobra PhoneLynx BT215
The bridge interfaces your old landline house phone to your cell phone. allowing me to save about $50 a month on phone bills.
The problem is, when it's working it's great, but it never seems to work for much more than a couple days, then need to do a new sync (or at least power cycle the cell phone). The problem is loss of audio/ring at the landline phone until you go through a cell power cycle. You can still dial out, but could only actually hear the ring feedback and distant end person talking at the cell phone and an incoming call wont ring at the landline phone. So now I test it every morning, to make sure all is well and power cycle the cell phone if not working, some what of a pain in the rear.
I've talked to both companies support and have got nowhere, but believe this is a Samsung problem. Unfortunately both of my cell phones are the same model and very recently acquired, so can't try a different model. The samsung support person reminded of Sargent Shultz (from the old TV series Hogan's Heros) "not my problem".

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Just a Bluetooth thing. Every time you get out of range and come back in or cut off phone and cut back on, it's going to re-synch. Sometimes it works, sometimes it doesn't.

I've never had this going into our out of my bluetooth equiped car, and the cell is never out of range from the bridge. Actually the cell is usualy within a few inches of the bridge unit.